

1884'. 127 



BEITISH HOMOPTERA—K^ ADDITIONAL SPECIES OF IDIOCERUS. 



BY JAMES EDWARDS. 



Idioceeus DISTINGUENDUS. 

 Idiocerus distinguendus, Kbm. Cicad., 157, 9 (1868). 



„ cognotus, Fieb.jYerh. k. k. z.-b. Gres. Wien, xviii, 455 (1868). 



Elytra lacteo-hjaline with three wide brown bands, which do not reach the 

 costa, and are placed as follows, viz., one at the base, one just beyond the middle, 

 and one occupying the 2nd, 3rd, and 4th apical areas. Face greenish-yellow, more 

 or less suffused with fuscous, the latter colour, in strongly marked examples, occu- 

 pying the entire surface from the base of the crown as far as the lower margin of 

 the eyes, leaving a spot adjoining each eye, also a triangular central spot on the base 

 of the crown, and a transversely-oval spot adjoining the lower margin of each eye, 

 of the pale ground-colour. The two last-named spots are frequently connected by 

 a pale line. These markings, however, are exceedingly variable, and more or less 

 perfect in different individuals. Pronotum greenish-yellow in the <J , somewhat 

 bluish-white in the ? , more or less suffused with fuscous in such a manner as to 

 leave the 'margins narrowly, a narrow central line, and a small somewhat round 

 spot near the middle on each side, of the pale ground-colour ; in front of each pale 

 lateral spot are two or three (generally two) black points. Scutellum pale, with a 

 triangle on each side of the base and two small roundish spots near the transverse 

 channel, fuscous. Elytra as stated above ; nerves white, except in the brown bands, 

 where they are dark brown, those of the corium distinctly bordered with punctures | 

 base and apex of the anal nerve white ; first sub-apical area parallel-sided, about 

 two-thirds as long as the 2nd, 1st apical area reaching about three-fourths as far as 

 the 4th. Abdomen bla«k above, with narrow green margins to the segments, 

 ; greyish-green beneath. ? genital plate with its hind margin somewhat roundly 

 'produced, pale, with traces of a broad dark central stripe, which is, perhaps, caused 

 by the oviduct showing through. Legs pale, apex of tarsi more or less fuscous. 



<J wanting the usual plate on the antennal setse. 



? , when fresh, with the face and legs rather strongly tinged with pink. 



Length, (J, 2i lin., $ , 2\ lin. 



''" Inhabits white poplar ; 2 (^ 12 ? examined. 



Easily confounded with Id. tremuJw, from which species the paler 

 ^'^"■bands of the elytra, and the constantly pale costal, sub-costal, 1st 

 mb-apical, and 1st apical, areas serve to distinguish it. 



Norwich : October 10th, 1884. 









[I quite concur in the identification of this species. Kirschbaum's 

 lescription has priority by its first publication in the " Jahrbiichern des 

 moti S"assauischen Yereins fiir Naturkunde," xxi and xxii (1867 and 1868). 



Erom the one poplar tree (Pojmlus alia) in Beaufort Gardens, 

 jewisham, I obtained, at the end of September and beginning of Octo- 

 ber of this year, altogether more than fifty examples, of which only 



